feat(wopi): fetch discover endpoint

pkg/wopi/wopi.go

@@ -0,0 +1,111 @@
+package wopi
+
+import (
+	"errors"
+	"fmt"
+	model "github.com/cloudreve/Cloudreve/v3/models"
+	"github.com/cloudreve/Cloudreve/v3/pkg/cache"
+	"github.com/cloudreve/Cloudreve/v3/pkg/request"
+	"net/url"
+	"path"
+	"strings"
+	"sync"
+)
+
+type Client interface {
+}
+
+var (
+	ErrActionNotSupported = errors.New("action not supported by current wopi endpoint")
+
+	queryPlaceholders = map[string]string{
+		"BUSINESS_USER":           "",
+		"DC_LLCC":                 "lng",
+		"DISABLE_ASYNC":           "",
+		"DISABLE_CHAT":            "",
+		"EMBEDDED":                "true",
+		"FULLSCREEN":              "true",
+		"HOST_SESSION_ID":         "",
+		"SESSION_CONTEXT":         "",
+		"RECORDING":               "",
+		"THEME_ID":                "darkmode",
+		"UI_LLCC":                 "lng",
+		"VALIDATOR_TEST_CATEGORY": "",
+	}
+)
+
+const (
+	wopiSrcPlaceholder = "WOPI_SOURCE"
+)
+
+type client struct {
+	cache cache.Driver
+	http  request.Client
+	mu    sync.RWMutex
+
+	discovery *WopiDiscovery
+	actions   map[string]map[string]Action
+
+	config
+}
+
+type config struct {
+	discoveryEndpoint *url.URL
+}
+
+func (c *client) NewSession(user *model.User, file *model.File, action ActonType) (*Session, error) {
+	if err := c.checkDiscovery(); err != nil {
+		return nil, err
+	}
+
+	ext := path.Ext(file.Name)
+	availableActions, ok := c.actions[ext]
+	if !ok {
+		return nil, ErrActionNotSupported
+	}
+
+	actionConfig, ok := availableActions[string(action)]
+	if !ok {
+		return nil, ErrActionNotSupported
+	}
+
+	actionUrl, err := generateActionUrl(actionConfig.Urlsrc, "")
+	if err != nil {
+		return nil, err
+	}
+
+	fmt.Println(actionUrl)
+
+	return nil, nil
+}
+
+func generateActionUrl(src string, fileSrc string) (*url.URL, error) {
+	src = strings.ReplaceAll(src, "<", "")
+	src = strings.ReplaceAll(src, ">", "")
+	actionUrl, err := url.Parse(src)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse action url: %s", err)
+	}
+
+	queries := actionUrl.Query()
+	queryReplaced := url.Values{}
+	for k := range queries {
+		if placeholder, ok := queryPlaceholders[queries.Get(k)]; ok {
+			if placeholder != "" {
+				queryReplaced.Set(k, placeholder)
+			}
+
+			continue
+		}
+
+		if queries.Get(k) == wopiSrcPlaceholder {
+			queryReplaced.Set(k, fileSrc)
+			continue
+		}
+
+		queryReplaced.Set(k, queries.Get(k))
+	}
+
+	actionUrl.RawQuery = queryReplaced.Encode()
+	return actionUrl, nil
+}